<template>
  <Dialog v-model="dialogVisible" :title="dialogTitle">
    <el-form
      ref="formRef"
      v-loading="formLoading"
      :model="formData"
      :rules="formRules"
      label-width="80px"
    >
      <el-form-item label="上级部门" prop="parentId">
        <el-tree-select
          v-model="formData.parentId"
          :data="deptTree"
          :props="defaultProps"
          check-strictly
          default-expand-all
          placeholder="请选择上级部门"
          value-key="deptId"
        />
      </el-form-item>
      <el-form-item label="部门名称" prop="name">
        <el-input v-model="formData.name" placeholder="请输入部门名称" />
      </el-form-item>
      <el-form-item label="显示排序" prop="sort">
        <el-input-number v-model="formData.sort" :min="0" controls-position="right" />
      </el-form-item>
      <el-form-item label="负责人" prop="leaderUserId">
        <el-select v-model="formData.leaderUserId" clearable placeholder="请输入负责人">
          <el-option
            v-for="item in userList"
            :key="item.id"
            :label="item.nickname"
            :value="item.id"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="城市" prop="cities">
        <el-select
          v-model="formData.cities"
          multiple
          filterable
          clearable
          :collapse-tags="false"
          placeholder="请选择省份/城市"
          class="w-full"
        >
          <template v-for="province in areaTree" :key="province.id">
            <el-option-group :label="province.name">
              <el-option
                :value="province.id"
                :label="province.name"
              >
                <span class="font-medium">{{ province.name }}（全省）</span>
              </el-option>
              <el-option
                v-for="city in province.children"
                :key="city.id"
                :value="city.id"
                :label="`${province.name} - ${city.name}`"
              >
                <span class="ml-4">{{ city.name }}</span>
              </el-option>
            </el-option-group>
          </template>
        </el-select>
        <!-- <div v-if="selectedAreaNames.length" class="mt-2 text-gray-500 text-sm">
          已选择：{{ selectedAreaNames.join('、') }}
        </div> -->
      </el-form-item>
      <el-form-item label="邮箱" prop="email">
        <el-input v-model="formData.email" maxlength="50" placeholder="请输入邮箱" />
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-select v-model="formData.status" clearable placeholder="请选择状态">
          <el-option
            v-for="dict in getIntDictOptions(DICT_TYPE.COMMON_STATUS)"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button type="primary" @click="submitForm">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script lang="ts" setup>
import { DICT_TYPE, getIntDictOptions } from '@/utils/dict'
import { defaultProps, handleTree } from '@/utils/tree'
import * as DeptApi from '@/api/system/dept'
import * as UserApi from '@/api/system/user'
import { CommonStatusEnum } from '@/utils/constants'
import { FormRules } from 'element-plus'
import * as AreaApi from '@/api/system/area'

defineOptions({ name: 'SystemDeptForm' })

const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗

const dialogVisible = ref(false) // 弹窗的是否展示
const dialogTitle = ref('') // 弹窗的标题
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formType = ref('') // 表单的类型：create - 新增；update - 修改
const formData = ref({
  id: undefined,
  title: '',
  parentId: undefined,
  name: undefined,
  sort: undefined,
  leaderUserId: undefined,
  cities: [],
  email: undefined,
  status: CommonStatusEnum.ENABLE
})
const formRules = reactive<FormRules>({
  parentId: [{ required: true, message: '上级部门不能为空', trigger: 'blur' }],
  name: [{ required: true, message: '部门名称不能为空', trigger: 'blur' }],
  sort: [{ required: true, message: '显示排序不能为空', trigger: 'blur' }],
  email: [{ type: 'email', message: '请输入正确的邮箱地址', trigger: ['blur', 'change'] }],
  cities: [{ required: true, message: '请至少选择一个城市', trigger: 'change' }],
  status: [{ required: true, message: '状态不能为空', trigger: 'blur' }]
})
const formRef = ref() // 表单 Ref
const deptTree = ref() // 树形结构
const userList = ref<UserApi.UserVO[]>([]) // 用户列表
const areaTree = ref<any[]>([]) // 地区树形数据

// 修改省市名称数组的计算属性
const selectedAreaNames = computed(() => {
  const names: string[] = []
  formData.value.cities.forEach((id: number) => {
    // 遍历省份
    areaTree.value.forEach((province) => {
      // 检查是否选中省份
      if (province.id === id) {
        names.push(`${province.name}（全省）`)
        return
      }
      // 检查城市
      province.children?.forEach((city) => {
        if (city.id === id) {
          names.push(`${province.name}-${city.name}`)
        }
      })
    })
  })
  return names
})

/** 获取地区树 */
const getAreaTree = async () => {
  const res = await AreaApi.getAreaTree()
  areaTree.value = res
}

/** 打开弹窗 */
const open = async (type: string, id?: number) => {
  dialogVisible.value = true
  dialogTitle.value = t('action.' + type)
  formType.value = type
  resetForm()
  
  // 先加载地区数据
  await getAreaTree()
  
  // 修改时，设置数据
  if (id) {
    formLoading.value = true
    try {
      const data = await DeptApi.getDept(id)
      // 如果有已保存的省市数据，转换为 ID 数组
      if (data.phone) {
        const areaNames = data.phone.split(',')
        const areaIds: number[] = []
        
        // 遍历省份和城市，找到匹配的名称对应的 ID
        areaTree.value.forEach((province) => {
          // 检查省份（带"全省"后缀）
          if (areaNames.includes(`${province.name}（全省）`)) {
            areaIds.push(province.id)
          }
          
          // 检查城市（带省份前缀）
          province.children?.forEach((city) => {
            if (areaNames.includes(`${province.name}-${city.name}`)) {
              areaIds.push(city.id)
            }
          })
        })
        
        // 设置选中的城市 ID 数组
        data.cities = areaIds
      }
      
      formData.value = data
    } finally {
      formLoading.value = false
    }
  }
  
  // 获得用户列表
  userList.value = await UserApi.getSimpleUserList()
  // 获得部门树
  await getTree()
}
defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  if (!formRef) return
  const valid = await formRef.value.validate()
  if (!valid) return
  
  // 提交请求
  formLoading.value = true
  try {
    const data = { ...formData.value } as unknown as DeptApi.DeptVO
    // 将选中的省市名称数组保存到 phone 字段，保持完整格式
    data.phone = selectedAreaNames.value.map(name => {
      // 保持原始格式，不做任何修改
      return name
    }).join(',')
    
    if (formType.value === 'create') {
      await DeptApi.createDept(data)
      message.success(t('common.createSuccess'))
    } else {
      await DeptApi.updateDept(data)
      message.success(t('common.updateSuccess'))
    }
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success')
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: undefined,
    title: '',
    parentId: undefined,
    name: undefined,
    sort: undefined,
    leaderUserId: undefined,
    cities: [],
    email: undefined,
    status: CommonStatusEnum.ENABLE
  }
  formRef.value?.resetFields()
}

/** 获得部门树 */
const getTree = async () => {
  deptTree.value = []
  const data = await DeptApi.getSimpleDeptList()
  let dept: Tree = { id: 0, name: '顶级部门', children: [] }
  dept.children = handleTree(data)
  deptTree.value.push(dept)
}
</script>

<style lang="scss" scoped>
:deep(.el-select-dropdown__item) {
  padding-right: 20px;

  &.selected {
    font-weight: bold;
    color: var(--el-color-primary);
  }
}

:deep(.el-select) {
  width: 100%;
}

:deep(.el-select__tags) {
  flex-wrap: wrap;
  max-height: none;
}

:deep(.el-select__tags-text) {
  display: inline-block;
  max-width: none;
}
</style>
